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Sending method and device for channel state information-reference symbol (CSI-RS)

A technology of CSI-RS and transmission method, which is applied in the field of channel state information reference symbols, can solve problems such as low system efficiency and large CSI-RS resource overhead, and achieve the effect of reducing overhead and improving capacity

Active Publication Date: 2013-11-13
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The main purpose of the present invention is to provide a CSI-RS transmission scheme to at least solve the problems of high CSI-RS resource overhead and low system efficiency in the related art

Method used

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  • Sending method and device for channel state information-reference symbol (CSI-RS)
  • Sending method and device for channel state information-reference symbol (CSI-RS)
  • Sending method and device for channel state information-reference symbol (CSI-RS)

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Embodiment 1

[0066] The embodiment of the present invention also provides a CSI-RS sending method, figure 2 is a flow chart of a CSI-RS sending method according to Embodiment 1 of the present invention, such as figure 2 As shown, the method includes:

[0067] Step S202, the network side according to UE i The downlink control information triggers a UE-oriented i The aperiodic CSI-RS configuration, where the UE i Indicates the i-th user;

[0068] Step S204, the network generates UE-oriented i The aperiodic CSI-RS reference signal, and send the reference signal to the UE i ;

[0069] Step S206, UE i Perform channel measurement and / or interference measurement according to the aperiodic CSI-RS reference signal, and obtain channel state information CSI according to the measurement result i .

[0070] Wherein, step S206 may have the following three implementations:

[0071] Implementation method 1, if the aperiodic CSI-RS reference signal is a non-zero power CSI-RS signal, the UE i C...

Embodiment 2

[0082] An embodiment of the present invention provides a method for sending a CSI-RS, the method including:

[0083] Step 1, the network side according to the UE i The downlink control information DCI i trigger a UE-oriented i The aperiodic CSI-RS configuration; where, UE i Indicates the i-th user;

[0084] Step 2, the network side generates UE-oriented i The aperiodic CSI-RS reference signal, and send the reference signal to the UE i ;

[0085] Step 3, UE i Perform channel measurement according to the aperiodic CSI-RS reference signal, and obtain channel state information CSI according to the measurement result i . Wherein, the aperiodic CSI-RS reference signal is a non-zero power CSI-RS signal, and the UE i Channel measurement based on aperiodic CSI-RS reference signal to obtain channel state information CSI i .

[0086] Wherein, all aperiodic CSI-RS reference signals may appear on subframes with a fixed period, and the period may be 5 ms or an integer multiple of...

Embodiment 3

[0108] The main content of this embodiment is the same as that of Embodiment 2, except that in Embodiment 2, the UE i The aperiodic CSI-RS signal and the UE j The periodic CSI-RS signals appear in different subframes, and in this embodiment, the UE i The aperiodic CSI-RS signal and the UE j The periodic CSI-RS signals appear in the same subframe.

[0109] The implementation process of this embodiment will be described in more detail below through a specific example. In this embodiment, aperiodic CSI-RS is used for channel measurement, and aperiodic CSI-RS triggered by different UEs appears in the same subframe in, such as Figure 4 shown.

[0110] The content of this example is basically the same as that of the specific example in Embodiment 2. The network side configures five CSI-RS reference signals for the terminal side (which can be UE1 or UE2). The five reference signals in this embodiment 1, 2, 3, and 5 in are the same as 1, 2, 3, and 5 in the five reference signals...

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Abstract

The invention provides a sending method and device for a channel state information-reference symbol (CSI-RS). The method comprises the steps of enabling a network side to trigger aperiodic CSI-RS configuration corresponding to first user equipment (UE) according to downlink control information (DCI) of the first UE; enabling the network side to generate the aperiodic CSI-RS corresponding to the first UE according to CSI-RS configuration information, and sending the aperiodic CSI-RS to the first UE. Through the sending method and device for the CSI-RS, spending of CSI-RS reference signals is reduced, and system capacity is improved.

Description

technical field [0001] The present invention relates to the field of communications, and in particular, to a method and device for transmitting a Channel State Information-Reference Symbol (CSI-RS for short). Background technique [0002] In wireless communication technology, when the base station side (e.g., evolved Node B, i.e. eNodeB, referred to as eNB) uses multiple antennas to transmit data, it can adopt spatial multiplexing to increase the data transmission rate, that is, use The same time-frequency resource transmits different data at different antenna positions, and a receiving end (such as user equipment, ie, User Equipment, referred to as UE) also uses multiple antennas to receive data. [0003] In the case of a single user, all antenna resources are allocated to the same user, and this user exclusively occupies the physical resources allocated to the base station side within a transmission interval. This transmission method is called Single User Multiple Input Mu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12
Inventor 徐俊李儒岳郭森宝孙云锋郑勇张峻峰
Owner ZTE CORP
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